Subversion-Projekte lars-tiefland.laravel_shop

<?php

namespace Illuminate\Queue;

class LuaScripts

{

    /**

     * Get the Lua script for computing the size of queue.

     *

     * KEYS[1] - The name of the primary queue

     * KEYS[2] - The name of the "delayed" queue

     * KEYS[3] - The name of the "reserved" queue

     *

     * @return string

     */

    public static function size()

    {

        return <<<'LUA'

return redis.call('llen', KEYS[1]) + redis.call('zcard', KEYS[2]) + redis.call('zcard', KEYS[3])

LUA;

    }

    /**

     * Get the Lua script for pushing jobs onto the queue.

     *

     * KEYS[1] - The queue to push the job onto, for example: queues:foo

     * KEYS[2] - The notification list for the queue we are pushing jobs onto, for example: queues:foo:notify

     * ARGV[1] - The job payload

     *

     * @return string

     */

    public static function push()

    {

        return <<<'LUA'

-- Push the job onto the queue...

redis.call('rpush', KEYS[1], ARGV[1])

-- Push a notification onto the "notify" queue...

redis.call('rpush', KEYS[2], 1)

LUA;

    }

    /**

     * Get the Lua script for popping the next job off of the queue.

     *

     * KEYS[1] - The queue to pop jobs from, for example: queues:foo

     * KEYS[2] - The queue to place reserved jobs on, for example: queues:foo:reserved

     * KEYS[3] - The notify queue

     * ARGV[1] - The time at which the reserved job will expire

     *

     * @return string

     */

    public static function pop()

    {

        return <<<'LUA'

-- Pop the first job off of the queue...

local job = redis.call('lpop', KEYS[1])

local reserved = false

if(job ~= false) then

    -- Increment the attempt count and place job on the reserved queue...

    reserved = cjson.decode(job)

    reserved['attempts'] = reserved['attempts'] + 1

    reserved = cjson.encode(reserved)

    redis.call('zadd', KEYS[2], ARGV[1], reserved)

    redis.call('lpop', KEYS[3])

end

return {job, reserved}

LUA;

    }

    /**

     * Get the Lua script for releasing reserved jobs.

     *

     * KEYS[1] - The "delayed" queue we release jobs onto, for example: queues:foo:delayed

     * KEYS[2] - The queue the jobs are currently on, for example: queues:foo:reserved

     * ARGV[1] - The raw payload of the job to add to the "delayed" queue

     * ARGV[2] - The UNIX timestamp at which the job should become available

     *

     * @return string

     */

    public static function release()

    {

        return <<<'LUA'

-- Remove the job from the current queue...

redis.call('zrem', KEYS[2], ARGV[1])

-- Add the job onto the "delayed" queue...

redis.call('zadd', KEYS[1], ARGV[2], ARGV[1])

return true

LUA;

    }

    /**

     * Get the Lua script to migrate expired jobs back onto the queue.

     *

     * KEYS[1] - The queue we are removing jobs from, for example: queues:foo:reserved

     * KEYS[2] - The queue we are moving jobs to, for example: queues:foo

     * KEYS[3] - The notification list for the queue we are moving jobs to, for example queues:foo:notify

     * ARGV[1] - The current UNIX timestamp

     *

     * @return string

     */

    public static function migrateExpiredJobs()

    {

        return <<<'LUA'

-- Get all of the jobs with an expired "score"...

local val = redis.call('zrangebyscore', KEYS[1], '-inf', ARGV[1], 'limit', 0, ARGV[2])

-- If we have values in the array, we will remove them from the first queue

-- and add them onto the destination queue in chunks of 100, which moves

-- all of the appropriate jobs onto the destination queue very safely.

if(next(val) ~= nil) then

    redis.call('zremrangebyrank', KEYS[1], 0, #val - 1)

    for i = 1, #val, 100 do

        redis.call('rpush', KEYS[2], unpack(val, i, math.min(i+99, #val)))

        -- Push a notification for every job that was migrated...

        for j = i, math.min(i+99, #val) do

            redis.call('rpush', KEYS[3], 1)

        end

    end

end

return val

LUA;

    }

    /**

     * Get the Lua script for removing all jobs from the queue.

     *

     * KEYS[1] - The name of the primary queue

     * KEYS[2] - The name of the "delayed" queue

     * KEYS[3] - The name of the "reserved" queue

     * KEYS[4] - The name of the "notify" queue

     *

     * @return string

     */

    public static function clear()

    {

        return <<<'LUA'

local size = redis.call('llen', KEYS[1]) + redis.call('zcard', KEYS[2]) + redis.call('zcard', KEYS[3])

redis.call('del', KEYS[1], KEYS[2], KEYS[3], KEYS[4])

return size

LUA;

    }

}